EP0780947A2 - Manchon de câble en matériau thermorétractable avec indicateur de température - Google Patents

Manchon de câble en matériau thermorétractable avec indicateur de température Download PDF

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Publication number
EP0780947A2
EP0780947A2 EP96119167A EP96119167A EP0780947A2 EP 0780947 A2 EP0780947 A2 EP 0780947A2 EP 96119167 A EP96119167 A EP 96119167A EP 96119167 A EP96119167 A EP 96119167A EP 0780947 A2 EP0780947 A2 EP 0780947A2
Authority
EP
European Patent Office
Prior art keywords
heat
temperature indicator
cable sleeve
sleeve according
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96119167A
Other languages
German (de)
English (en)
Other versions
EP0780947A3 (fr
Inventor
Hans-Jürgen Dipl.-Ing. Meltsch
Sigrid Dr.Rer Nat. Rose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RXS Gesellschaft fuer Vermoegensverwaltung GmbH
Original Assignee
RXS Schrumpftechnik Garnituren GmbH
RXS Kabelgarnituren GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RXS Schrumpftechnik Garnituren GmbH, RXS Kabelgarnituren GmbH filed Critical RXS Schrumpftechnik Garnituren GmbH
Publication of EP0780947A2 publication Critical patent/EP0780947A2/fr
Publication of EP0780947A3 publication Critical patent/EP0780947A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/1806—Heat shrinkable sleeves
    • H02G15/1813—Wraparound or slotted sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
    • B29C61/0641—Clips for dividing preforms or forming branch-offs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
    • B29C61/0666—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms comprising means indicating that the shrinking temperature is reached
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/10—Making preforms having internal stresses, e.g. plastic memory by bending plates or sheets

Definitions

  • the invention relates to a heat-shrinkable cable sleeve with closure elements and a closure rail overlapping the closure elements and a temperature indicator in the closure area.
  • a heat-shrinkable cable sleeve of the type mentioned is known for example from EP 0 238 325 - A2.
  • a white marking is visible as a temperature indicator in the closure area if there has been sufficient heat.
  • the marking runs along the sealing beads of the cable sleeve and is visible through the mechanical movement of the sealing beads as a result of the shrinking process through the slots in the sealing rail. It is therefore indicated that a certain tension is exerted on the closure elements as a result of the shrinking process, which indicates that the shrinking process has ended.
  • thermal envelope colors are also used as temperature indicators for the optical temperature display in cable sleeves, which change their color or appearance when the corresponding temperature is reached.
  • a thermal envelope ink is known from US 4,344,909, which is applied to the entire surface of the cable sleeve.
  • No special optical temperature displays are provided in the particularly critical areas of the longitudinal closure or the front cable entries, if you do not consider that the outflow of hot melt adhesive from the forehead area is considered an indication of sufficient heat.
  • Suitable indicator materials are known, for example, from Römpp chemistry lexicon, Georg Thieme Verlag, born in 1992.
  • the object of the invention is that in the critical areas of the longitudinal closure and the front cable entries, especially in the case of cable branches, a safe optical display for sufficient heat supply is obtained, so that it is ensured that the hot melt adhesive introduced there has been melted sufficiently for sealing.
  • the object is achieved with a heat-shrinkable cable sleeve of the type described in the introduction in that the temperature indicator is applied to the closure rail and that the optical temperature display is adapted by the temperature indicator to the required target temperature inside the closure area.
  • the problems at hand for an adequate supply of heat during the shrinking process in the longitudinal closure areas with all mechanical closure elements or in the sleeve end areas, for example in the case of branches, are advantageously solved.
  • the visual display with the aid of the temperature indicator then shows when the heat input is sufficient to ensure complete melting of the introduced adhesive.
  • the heat supply can only be ended after this display has taken place.
  • This visual display is carried out with a temperature indicator, which is applied either already at the factory or after or during assembly of the closure elements on the respective closure element, for example a closure rail or on a clip in the cable entry area.
  • a clip in the front branch area can have, for example, a U-shaped or E-shaped structure.
  • the temperature indicator is in relation to the required temperature and the duration of the heat adjusted or selected to the respective place of use and / or the material properties of the sealants used such as glue.
  • the material properties such as the viscosity of the adhesive used and its material geometries, play a role here.
  • polyamide adhesives are used for these applications, which give good adhesion to the material of the cable sleeve, usually pre-treated (corona) polyethylene.
  • thermo indicator which have different response thresholds, so that a number of critical temperature values can be identified separately from one another.
  • one temperature indicator with a response for sufficient heat input and another temperature indicator with a threshold indicating a critical temperature can be used in combination.
  • the temperature indicator for the locking bar can and must only respond at higher temperature values, since the adhesive in the internal locking area takes longer to melt, while a lower limit value must be displayed in the cable entry area so as not to endanger the cables that are inserted.
  • acrylic or alkyd resins with temperature-sensitive inorganic color pigments such as (NH 4 ) 2 U 2 0 7 and (NH 4 ) 3 PO 4 ⁇ 12MoO 3 are suitable for this.
  • FIG. 1 conveys the design of a closure rail or clamping rail KS for a shrinkable cable sleeve, which is slid over the longitudinal edges of the cable sleeve.
  • hot-melt adhesive is applied for sealing, which melts when heat is applied and seals the longitudinal slot.
  • the clamping rail KS is now coated over its entire surface with a temperature indicator TIV, which changes its color or its surface structure at a temperature value if it is ensured that sufficient heat has been supplied to the interior of the closure area for melting the hot melt adhesive.
  • This change in value is approximately 150 ° to 400 ° C., preferably approximately 160 to 350 ° C.
  • FIG. 2 shows the arrangement of the closure area, which shows that a hot melt adhesive SK is introduced between the closure elements VE of the cable sleeve K or is contained as a coating on the cable sleeve, which must be melted by the application of heat.
  • the changeover point of the temperature indicator TIV which is arranged on the clamping rail KS on the outside, is evaluated as a visual display.
  • This arrangement is shown very schematically in FIG. 2 in order to be able to clearly show the conditions. In reality, the locking rail grips the locking elements very tightly and presses them against each other.
  • FIG. 4 conveys that temperature indicators TIP have to be arranged only partially or partially at the critical area, for example in the end areas and in the middle of the cable sleeve.

Landscapes

  • Cable Accessories (AREA)
  • Processing Of Terminals (AREA)
EP96119167A 1995-12-18 1996-11-28 Manchon de câble en matériau thermorétractable avec indicateur de température Withdrawn EP0780947A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19547286 1995-12-18
DE19547286 1995-12-18

Publications (2)

Publication Number Publication Date
EP0780947A2 true EP0780947A2 (fr) 1997-06-25
EP0780947A3 EP0780947A3 (fr) 1998-04-01

Family

ID=7780477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96119167A Withdrawn EP0780947A3 (fr) 1995-12-18 1996-11-28 Manchon de câble en matériau thermorétractable avec indicateur de température

Country Status (3)

Country Link
EP (1) EP0780947A3 (fr)
CN (1) CN1160300A (fr)
AR (1) AR005121A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6623181B1 (en) 1998-05-02 2003-09-23 Tyco Electronics Raychem N.V. Support for a splice in an elongate element

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344909A (en) 1978-12-22 1982-08-17 N.V. Raychem S.A. Thermochromic composition
EP0238325A2 (fr) 1986-03-19 1987-09-23 N.V. Raychem S.A. Indicateur pour manchons à reprise dimensionnelle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121011A (en) * 1975-11-28 1978-10-17 Raychem Corporation Polymeric article coated with a thermochromic paint
GB1604981A (en) * 1978-01-09 1981-12-16 Raychem Sa Nv Branchoff method
GB2069591B (en) * 1980-02-19 1984-09-05 Raychem Sa Nv Closure assembly for a recoverable wraparound sleeve
DE3504380A1 (de) * 1985-02-08 1986-08-14 Siemens AG, 1000 Berlin und 8000 München Manschette aus schrumpfbarem material und ein verfahren zur herstellung derselben
JPS6279283A (ja) * 1985-10-02 1987-04-11 Pilot Ink Co Ltd 熱変色性材料
EP0628144B1 (fr) * 1992-02-25 1998-07-01 Raychem Corporation Objet retrouvant sa forme sous l'effet de la chaleur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344909A (en) 1978-12-22 1982-08-17 N.V. Raychem S.A. Thermochromic composition
EP0238325A2 (fr) 1986-03-19 1987-09-23 N.V. Raychem S.A. Indicateur pour manchons à reprise dimensionnelle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ROEMPP.: "Chemielexikon.", 1992, GEORG THIEME VERLAG.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6623181B1 (en) 1998-05-02 2003-09-23 Tyco Electronics Raychem N.V. Support for a splice in an elongate element

Also Published As

Publication number Publication date
AR005121A1 (es) 1999-04-14
CN1160300A (zh) 1997-09-24
EP0780947A3 (fr) 1998-04-01

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